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Finding the Fourth Proportional to 83,603.88, 125,405.34 and 20,424.36

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Solution

The fourth proportional to 83,603.88, 125,405.34 and 20,424.36 is: 30,636.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,603.88 : 125,405.34 = 20,424.36 : x
  2. Step 2: Convert to fraction form
    83,603.88/125,405.34 = 20,424.36/x
  3. Step 3: Cross multiply
    83,603.88x = 125,405.34 × 20,424.36
  4. Step 4: Simplify right side
    83,603.88x = 2,561,323,810.08
  5. Step 5: Solve for x
    x = 2,561,323,810.08/83,603.88
  6. Step 6: Final answer
    x = 30,636.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.